Conveners
Theoretical developments and applications beyond the SM
- Evan Berkowitz (University of the Virgin Islands)
Theoretical developments and applications beyond the SM
- Yannick Meurice (University of Iowa)
Theoretical developments and applications beyond the SM
- Nobuyuki Matsumoto (Boston University)
Theoretical developments and applications beyond the SM
- Matteo Bresciani (Trinity College Dublin)
Theoretical developments and applications beyond the SM
- Hersh Singh (Fermilab)
Theoretical developments and applications beyond the SM
- Shinichiro Akiyama (University of Tsukuba)
Theoretical developments and applications beyond the SM
- Robert Mawhinney (Columbia University)
Theoretical developments and applications beyond the SM
- Antonio Smecca (INFN - Sezione di Roma Tre)
-
Fangcheng He27/07/2026, 14:002Theoretical developments and applications beyond the Standard ModelContributed talk
In this talk, I will present recent progress in our lattice QCD calculation of the $\theta$-induced neutron electric dipole moment (nEDM) using the background electric field method. The signal for the nEDM can be enhanced by employing the FeynmanโHellmann theorem. I will also compare results obtained with different nucleon interpolating operators and discuss their effectiveness in suppressing...
Go to contribution page -
Rajan Gupta27/07/2026, 14:20Theoretical developments and applications beyond the Standard ModelContributed talk
Results on axial vector form factors and contributions of CP violating interactions to neutron electric dipole moment from ongoing calculations by the PNDME and NME collaboration will be presented.
Go to contribution page -
Roberto Dionisio (University of Pisa, INFN sez. di Pisa)27/07/2026, 14:403Theoretical developments and applications beyond the Standard ModelContributed talk
We present a first lattice study of the momentum-dependent real-time topological transition rate in quenched QCD. In full QCD, this quantity plays an important role in determining the hot axion abundance. The rate is obtained by reconstructing the relevant spectral function from Euclidean topological charge density correlators using the HansenโLupoโTantalo (HLT) method. We present results from...
Go to contribution page -
Mika Lauk (HU-Berlin)27/07/2026, 15:004Theoretical developments and applications beyond the Standard ModelContributed talk
The two-dimensional $O(3)$ nonlinear sigma model is a well known toy model for studying non-perturbative phenomena in quantum field theory and QCD. With the latter it shares the fact that there is a non-trivial topological structure and the path integral splits into topological sectors. In the lattice theory topology can be defined as well, but semi-classical arguments suggest that the...
Go to contribution page -
Donald Sinclair (Argonne National Laboratory)27/07/2026, 15:20Theoretical developments and applications beyond the Standard ModelContributed talk
We use RHMC simulations to study chiral symmetry breaking for massless lattice QED in a strong external magnetic field. Our earlier simulations had shown that chiral symmetry is broken by a strong external magnetic field $B$ with $eB=2\pi\times100/36^2=0.4848...$ at bare coupling $\alpha=1/5$ and predicted the condensate in the massless limit. We had later performed simulations with a...
Go to contribution page -
Evan Berkowitz (University of the Virgin Islands)27/07/2026, 16:10Theoretical developments and applications beyond the Standard ModelContributed talk
Because it offers exactly-integer topological quantities, the modified Villain discretization offers a route to correct anomaly structure at finite lattice spacing. I will present a 4-dimensional purely-bosonic modified Villain model with an ABJ-type vector-vector-axial anomaly.
The model appears to have a direct continuous phase transition from one SSB phase to another, giving hope of...
Go to contribution page -
Tatsuya Yamaoka (The university of Osaka)27/07/2026, 16:301Theoretical developments and applications beyond the Standard ModelContributed talk
We investigate the mass term structure and anomalies of the 3+1-dimensional staggered fermion Hamiltonian. We show that the lattice Hamiltonian possesses conserved charges generating the Onsager algebra, which realize $\mathrm{U}(1)_{F_i} \subset \mathrm{SU}(2)_L \times \mathrm{SU}(2)_R$ $(i = x, y, z)$ in the continuum limit. We classify all bilinear mass terms local within a unit cube and...
Go to contribution page -
Jinlong Dang (Peking University)27/07/2026, 16:50Theoretical developments and applications beyond the Standard ModelContributed talk
The Standard model as a chiral gauge theory is the core foundation of particle physics. Yet, no consensus has been reached on non-perturbative formulations of chiral gauge theories although a few number of promising theoretical models have been constructed. In this work, we exam the extra dimension or domain wall fermion approach. Firstly, we numerically tested the slab (Grabowska-Kaplan)...
Go to contribution page -
Soma Onoda (Kyushu University)27/07/2026, 17:10Theoretical developments and applications beyond the Standard ModelContributed talk
A central challenge in formulating chiral gauge theories on the lattice is to realize the anomaly-cancellation mechanism of the continuum theory at finite lattice spacing. In this talk, I present a bosonization-based lattice formulation for two-dimensional non-Abelian chiral gauge theories.
In the continuum bosonized description, the gauge anomaly of chiral fermions is encoded as anomaly...
Go to contribution page -
Nuno Brito (University of Plymouth)28/07/2026, 14:002Theoretical developments and applications beyond the Standard ModelContributed talk
We investigate the low-lying flavour-singlet spectrum of an $Sp(4)$ lattice gauge theory with fermions in both the fundamental and two-index antisymmetric representations, using the Wilson gauge action and Wilson fermions. Our analysis employs a generalized eigenvalue problem on a basis of smeared interpolating operators comprising glueball and meson operators from both fermion representations...
Go to contribution page -
Alexis Harilaos Verney-Provatas (Swansea University/The University of Edinburgh)28/07/2026, 14:20Theoretical developments and applications beyond the Standard ModelContributed talk
We investigate, for the first time, the Sp(4) lattice gauge theory in the presence of fermions at finite temperature, examining the theory with two dynamical Wilson fermions in the fundamental representation. The continuum theory is of interest as it provides a realisation of composite dark matter and may generate an observable stochastic gravitational wave signal, sourced by a phase...
Go to contribution page -
Gianmarco Simonetti (The University of Edinburgh/Swansea University)28/07/2026, 14:40Theoretical developments and applications beyond the Standard ModelContributed talk
We present an extensive study of Mรถbius domain wall fermions (MDWF) in four-dimensional $Sp(4)$ gauge theory with two dynamical fermions transforming in the fundamental representation. This is, to our knowledge, the first comprehensive application of MDWF to $Sp(4)$ lattice gauge theories, which are relevant to composite Higgs and dark matter models based on the $SU(4)/Sp(4)$ coset. The MDWF...
Go to contribution page -
Yannick Meurice (University of Iowa)28/07/2026, 15:00Theoretical developments and applications beyond the Standard ModelContributed talk
We discuss recent numerical results for the zeros of the partition function for a four dimensional SU(3) lattice gauge theory with 12 staggered fermions having identical masses and an unimproved action (arXiv: 2606.14642).
Go to contribution page
Our results indicate that beyond some critical mass, a gap between the lowest zero and the real axis in the complex coupling plane develops and can be related to the... -
Dr Marios Costa (Cyprus University of Technology)28/07/2026, 15:202Theoretical developments and applications beyond the Standard ModelContributed talk
We present a lattice formulation of $\mathcal{N}=1$ supersymmetric QCD (SQCD) based on overlap fermions, providing a discretization consistent with the GinspargโWilson relation. Particular emphasis is placed on the construction of Yukawa terms that preserve a lattice-modified chiral symmetry involving overlap quarks and gluinos. To realize this modified chiral symmetry in the Yukawa sector, we...
Go to contribution page -
Jaakko Hรคllfors28/07/2026, 16:10Theoretical developments and applications beyond the Standard ModelContributed talk
First-order phase transitions are common in many beyond the Standard Model theories. Nucleating transitions are particularly interesting, since they leave behind a gravitational wave background (GWB) that could be observable in many near-future experiments. The nucleation rate determines how fast the transition completes and is needed for precision predictions of the GWB.
Typically, the...
Go to contribution page -
Johann Ostmeyer (University of Bonn)28/07/2026, 16:30Theoretical developments and applications beyond the Standard ModelContributed talk
The 3D chiral Heisenberg model is a theory of relativistic fermions in three spacetime dimensions with SU(2) symmetry. We simulate it numerically as a lattice field theory using domain wall fermions and locate the phase transition corresponding to spontaneous SU(2)$\to$U(1) breaking. This phase transition belongs to the large "chiral Heisenberg" universality class, containing among others the...
Go to contribution page -
Aaron Haarti (University of Helsinki)28/07/2026, 16:50Theoretical developments and applications beyond the Standard ModelContributed talk
In pure SU(N) gauge theory, we measure interface tensions between distinct deconfined phases (different $Z_N$-centers) using two complementary methods. These deconfined-deconfined (DD) interface tensions generally depend on the $Z_N$-phase shift across the interface and on the temperature T. We use a twisted boundary condition to produce two ordered phases simultaneously with a DD interface...
Go to contribution page -
Felix Strohkirch28/07/2026, 17:10Theoretical developments and applications beyond the Standard ModelContributed talk
Zigzag graphene nanoribbons are narrow strips of graphene with parallel zigzag edge termination that sparked research interest in recent years due to their distinctive electronic and magnetic properties. They exhibit partially flat edge bands around the Fermi level that host edge-localized states. These edge states give rise to a robust magnetic order. At half-filling, the edges are known to...
Go to contribution page -
Gota Tanaka (Meiji Gakuin University)30/07/2026, 14:00Theoretical developments and applications beyond the Standard ModelContributed talk
Entanglement negativity is a measure of quantum entanglement and defined as the trace norm of the partially transposed density matrix. One of the important properties of entanglement negativity is that it can be used to quantify the amount of entanglement in mixed states. We represent the density matrix of a 1D quantum system as a 2D tensor network and calculate the entanglement negativity...
Go to contribution page -
Takahiro Hayazaki (Kanazawa University)30/07/2026, 14:201Theoretical developments and applications beyond the Standard ModelContributed talk
Entanglement entropy (EE) is a measure of quantum entanglement and provides a powerful probe of critical behavior. In particular, an effective central charge can be extracted from the EE and is expected to provide valuable information about criticality. We compute the EE in the (1+1)-dimensional real scalar $\phi^4$ theory using the higher-order tensor renormalization group (HOTRG) method. We...
Go to contribution page -
Hayato Aizawa (University of Tsukuba)30/07/2026, 14:40Theoretical developments and applications beyond the Standard ModelContributed talk
The step-scaling function (SSF) is a non-perturbative tool to determine the running coupling in lattice gauge theory.
Go to contribution page
The tensor renormalization group (TRG), which is free from the sign problem, allows us calculate the SSF in the CP(1) model with a $\theta$ term. We first study the $\theta = 0$ case to validate the calculation of the SSF with the TRG method comparing our results with the... -
Yuto Sugimoto (Tohoku University)30/07/2026, 15:00Theoretical developments and applications beyond the Standard ModelContributed talk
We investigate the phase structure of two- and three-color QCD in the strong coupling limit using the tensor renormalization group method. By analytically integrating out the gauge fields, the partition function can be represented as a Grassmann tensor network. Applying the tensor renormalization group method to the network allows us to directly calculate partition functions in the cold and...
Go to contribution page -
Shinichiro Akiyama (University of Tsukuba)30/07/2026, 15:20Theoretical developments and applications beyond the Standard Model
We investigate the phase structure of the (1+1)-dimensional single-flavor GrossโNeveu model with Wilson fermions using the Grassmann corner transfer matrix renormalization group (CTMRG). The path integral is formulated as a two-dimensional Grassmann tensor network and approximately contracted by the Grassmann CTMRG algorithm. We investigate the phase diagram by varying the fermion mass and the...
Go to contribution page -
Gwen Hartshaw (Syracuse University)30/07/2026, 16:101Theoretical developments and applications beyond the Standard ModelContributed talk
We conduct numerical simulations to map out the phase diagram and critical behavior of a lattice Higgs model composed of a massless staggered fermion transforming in the fundamental representation of $SU(2)$ and coupled to a scalar field in the adjoint representation of the group. The scalar action consists of quadratic, quartic terms and a derivative term. At fixed quartic coupling we explore...
Go to contribution page -
Marina Krstic Marinkovic (ETH Zurich)30/07/2026, 16:302Theoretical developments and applications beyond the Standard ModelContributed talk
Symmetric mass generation denotes an unconventional continuum QFT mechanism, in which fermions acquire mass without a fermion bilinear condensate, i.e., without spontaneous symmetry breaking. The symmetric mass generation (SMG) mechanism can be studied in a Euclidean lattice model with two flavors of massless staggered fermions and two independent four-fermion interactions. In this talk, I...
Go to contribution page -
Thea Budde (ETH Zรผrich)30/07/2026, 16:50Theoretical developments and applications beyond the Standard ModelContributed talk
Non-integrable quantum many-body systems are generally expected to thermalize. That is, local observables relax to values predicted by a thermal ensemble constrained by the conserved quantities. However, in recent years, a growing number of exceptions have been identified, including many lattice Hamiltonians with gauge symmetry. In this talk, based on arXiv:2604.15820, I will outline how...
Go to contribution page -
Finn Temmen (Forschungszentrum Jรผlich, IAS-4)30/07/2026, 17:101Theoretical developments and applications beyond the Standard ModelContributed talk
The Hubbard model offers a powerful minimal description of molecules and materials, yet it neglects several effects and interactions observed in nature that give rise to a much richer variety of physics. For instance, extending the on-site interaction to include nonlocal interactions gives rise to a competition between strongly correlated phases, while incorporating spin-orbit coupling can...
Go to contribution page -
Rui Xian Siew (Duke University)31/07/2026, 14:00Theoretical developments and applications beyond the Standard ModelContributed talk
Traditional Hamiltonian lattice gauge theory (LGT) regularizes continuum gauge fields using bosonic link degrees of freedom, leading to infinite-dimensional local Hilbert spaces. Qubit regularization takes a different route: it builds new gauge-invariant quantum lattice systems with finite-dimensional local Hilbert spaces from the outset and obtains continuum relativistic quantum field...
Go to contribution page -
Nobuyuki Matsumoto (Boston University)31/07/2026, 14:20Theoretical developments and applications beyond the Standard ModelContributed talk
We report on a study of fully interacting QED3 in radial quantization with overlap fermions. By including a soft breaking mass for the flavor symmetry, and by varying the refinement level of the base icosahedral lattice as L=1, 2, 4, the possible spontaneous symmetry breaking (SSB) is studied. By using the radial quantization, the scaling symmetry is preserved, which makes it an ideal setup to...
Go to contribution page -
John Laiho (Syracuse University)31/07/2026, 14:40Theoretical developments and applications beyond the Standard ModelContributed talk
We discuss the calculation of Euclidean correlation functions in lattice quantum gravity and in the low energy effective theory using perturbation theory. In the low energy theory the leading contributions are universal predictions of quantum gravity, depending only on Newton's constant, thus providing an important test for lattice calculations. We present the calculations in the low energy...
Go to contribution page -
Juan Falceto31/07/2026, 15:001Theoretical developments and applications beyond the Standard ModelContributed talk
In recent years, a lot of evidence has been gathered for exponential clover Wilson fermions suggesting that cutoff effects are reduced compared to standard clover improved Wilson fermions. The exponential clover implementation gives rise to new vertices in perturbation theory, which need to be incorporated in perturbative calculations of, e.g., improvement coefficients. Here, we study possible...
Go to contribution page -
Matteo Bresciani (Trinity College Dublin)31/07/2026, 15:201Theoretical developments and applications beyond the Standard ModelContributed talk
We present a non-perturbative determination of the renormalization constants of the non-singlet components of the QCD energy-momentum tensor on the lattice. The calculation is carried out with the Wilson plaquette gauge action and $N_f=3$ flavours of $O(a)$-improved Wilson fermions. The four independent renormalization constants, associated to the sextet and the triplet representations of the...
Go to contribution page -
Nobuyuki Matsumoto (Boston University)31/07/2026, 16:10Theoretical developments and applications beyond the Standard ModelContributed talk
We report on the gravitational wave spectrum study from the confinement transition in the one-flavor SU(4) Hyper Stealth Dark Matter theory. We use the multihistogram method to construct the Polyakov loop effective potential in the complex plane, from which the order of transition as well as the tunneling rate is obtained. This method allows us to study the gravitational wave spectrum down to...
Go to contribution page -
Andrea Falzetti ("Sapienza" University of Rome)31/07/2026, 16:30Theoretical developments and applications beyond the Standard ModelContributed talk
The study of large-$N$ Yang-Mills theories is theoretically interesting because of the many mathematical simplifications that appear when the rank of the gauge group goes to infinity, and the dynamics of such theories is conjectured to be key to tackle other open problems such as the confinement mechanism. We report on the advancements in our efforts to compute the Glueball and Meson spectra...
Go to contribution page